CN219563806U - Plastic granulator with sieving mechanism - Google Patents

Abstract

The utility model discloses a plastic granulator with a screening device, which comprises a frame, wherein a screening box is arranged on the frame, a plurality of distributing mechanisms distributed along the vertical direction are arranged on the screening box, each distributing mechanism comprises a first distributing component and a second distributing component, each first distributing component comprises a first sieve plate, a plurality of discharging holes are formed in the screening box, the discharging holes are in one-to-one correspondence with the distributing mechanisms, the first sieve plates are obliquely arranged in the screening box, the lowest end of each first sieve plate is positioned in the discharging hole, each second distributing component comprises a material receiving box, a second sieve plate and a material guiding pipe, the material receiving box is arranged on the screening box and below the discharging hole, the second sieve plates are arranged in the material receiving box, the sieve holes are the same as the first sieve plates in size, the material guiding pipe is arranged on the material receiving box and communicated with the screening box, and the sieve holes of the first sieve plates on the upper sides of the adjacent two first sieve plates are larger than those of the first sieve plates on the lower sides. The plastic granules can be screened step by the plurality of material separating mechanisms, and the screening precision of the plastic granules is improved.

Description

Plastic granulator with sieving mechanism

Technical Field

The utility model relates to the technical field of plastic pellet production, in particular to a plastic pelletizer with a screening device.

Background

The plastic granules are various, different plastic granules can be produced into different plastic products, the plastic granule production process generally comprises raw material classification, raw material crushing and cleaning, automatic feeding and inputting into a main machine for plasticizing, auxiliary machine extrusion, water or air cooling, automatic granule cutting and bagging, and a discharging device is needed between automatic granule cutting and bagging.

The Chinese patent of the utility model with the publication number of CN212123833U discloses a plastic granulator with a screening device, which comprises a first support plate, wherein a first base is fixedly connected to the bottom of the first support plate, a plastic granulator body is fixedly connected to the top of the first support plate, a feeding pipe is fixedly connected to the top of the plastic granulator body, a first discharging pipe is fixedly connected to one side of the plastic granulator body, a screening box is fixedly connected to the top of the first support plate, a discharging box is movably connected to the inner wall of the screening box, and a second discharging pipe is fixedly connected to one side of the screening box.

As described above, the screening device, although being able to screen plastic granules through the screening plate during operation, has low screening precision, and the granules after screening have different sizes, and the granules with different sizes are heated and melted by the extruder in the same time period and have different melting degrees, so that the performance of plastic products can be affected.

Disclosure of Invention

In order to more fully screen plastic particles and further improve the quality effect of plastic products, the utility model provides a plastic granulator with a screening device.

The plastic granulator with the screening device provided by the utility model adopts the following technical scheme:

the utility model provides a plastics granulator with sieving mechanism, includes frame and granulator, be provided with the discharging pipe on the granulator, be provided with the screening case of top and discharging union coupling in the frame, be provided with a plurality of feed mechanism that distribute along vertical direction on the screening case, feed mechanism includes first feed divider subassembly and second feed divider subassembly, first feed divider subassembly includes first sieve, a plurality of bin outlet have been seted up on the screening case, bin outlet and feed divider one-to-one, first sieve slope sets up in screening case and the extreme is located the bin outlet, second feed divider includes material receiving box, second sieve and passage, material receiving box sets up on the screening case and is located the bin outlet below, the second sieve sets up in material receiving box and sieve mesh size the same with first sieve, the passage sets up on the material receiving box and communicates with the screening case, the passage is located the second below, two adjacent the sieve mesh that is located the sieve of the first upper side diameter is greater than the first sieve of the first sieve, the sieve bottom of the sieve has the sieve.

Through adopting above-mentioned technical scheme, when using, the plastic pellet passes through the discharging pipe and arrives the screening incasement from the granulator, on the plastic pellet gets into the first sieve in the feed divider of top earlier behind the screening case, first sieve carries out the first screening to the plastic pellet, wherein, the second screening is carried out on the first sieve that part plastic pellet falls into next feed divider after screening, another part plastic pellet falls into the material receiving incasement through the bin after screening and collects and screen once more, the plastic pellet after screening once more through the second sieve carries out the screening of second time on the first sieve in next feed divider through the passage, repeat above-mentioned screening work, after the screening, the plastic pellet that is less than first sieve mesh size in the last feed divider falls to screening bottom of the case and discharges through the discharge pipe. In operation, through setting up a plurality of feed mechanism and screening step by step to the plastic pellet, can be more accurate select the plastic pellet of equidimension not, simultaneously, the second sieve in the same feed mechanism carries out the secondary to the plastic pellet and screens, has further improved screening precision.

Optionally, a plurality of first vibrating mechanisms are arranged on the screening box, and the first vibrating mechanisms are in one-to-one correspondence with the first screen plates and drive the first screen plates to vibrate.

Through adopting above-mentioned technical scheme, first sieve vibrates under first vibration mechanism's effect for the plastic pellet can more disperse distribute on first sieve, reduce the possibility that the piling up of jumbo size plastic pellet hinders the screening of small-size plastic pellet when improving screening efficiency.

Optionally, the first vibration mechanism includes a plurality of first springs, first motor and first eccentric wheel, first sieve slides and connects on the screening box, and is a plurality of the one end of first spring sets up on the screening box, and the other end sets up on first sieve, first motor sets up on the screening box, first eccentric wheel sets up on the output shaft of first motor and lateral wall and first sieve conflict.

Through adopting above-mentioned technical scheme, start first motor, the rotation of first motor output shaft drives first eccentric wheel and rotates, and first eccentric wheel rotates in-process collision first sieve, and in the work, first spring is used for driving first sieve and resets, under the continuous collision of first eccentric wheel, the vibration of first sieve can make the plastic pellet on the first sieve more dispersed, rational in infrastructure, easy operation.

Optionally, the first spring is provided with a clamping piece, and the first sieve plate is detachably connected to the first spring through the clamping piece.

Through adopting above-mentioned technical scheme, under long-time work, collision damage can appear in first sieve, can dismantle the connection on first spring through first sieve, makes things convenient for operating personnel to change the first sieve of damage.

Optionally, a plurality of intercommunication mouths have been seted up on the lateral wall that the bin was kept away from the bin outlet, intercommunication mouthful and bin outlet one-to-one just are located the bin outlet top, the joint spare includes the joint board, the joint board sets up on first spring and slides with the bin screen and be connected, joint board one end is located the intercommunication mouthful, and the other end is located the bin outlet, the joint board has been seted up the joint mouth that runs through joint board upper and lower surface on keeping away from the lateral wall of bin outlet, the joint groove has all been seted up on the inside wall of joint mouth, first sieve grafting cooperation is in the joint inslot.

Through adopting above-mentioned technical scheme, in the work first sieve peg graft all the time and cooperate in the joint inslot, when needs change first sieve, operating personnel pull out first sieve from the joint inslot change can, simple structure, convenient operation.

Optionally, the material receiving boxes are all provided with second vibrating mechanisms, and the second vibrating mechanisms are used for driving the second sieve plates to vibrate.

Through adopting above-mentioned technical scheme, the in-process second vibration mechanism drive second sieve vibration that the second sieve was screened the plastic pellet for the plastic pellet can more dispersed distribute on the second sieve, reduces the plastic pellet and piles up and influence the possibility of screening effect.

Optionally, the second vibration mechanism includes a plurality of second springs, second motor and second eccentric wheel, the second sieve slides and connects on connecing the workbin, and is a plurality of the one end of second spring sets up on the screening case, and the other end sets up on the second sieve, the second motor sets up on connecing the workbin, the second eccentric wheel sets up on the output shaft of second motor and lateral wall and the conflict of second sieve.

Through adopting above-mentioned technical scheme, start the second motor, the rotation of second motor output shaft drives the second eccentric wheel and rotates, and the second eccentric wheel rotates in-process collision second sieve, and in operation, the second spring is used for driving the second sieve and resets, and under the continuous collision of second eccentric wheel, the vibration of second sieve can make the plastic pellet on the second sieve more dispersed, rational in infrastructure, easy operation.

Optionally, a plurality of shielding components for controlling the discharge caliber of the discharge port are arranged on the screening box, and the shielding components are in one-to-one correspondence with the discharge port.

Through adopting above-mentioned technical scheme, shelter from the subassembly and can control and adjust the ejection of compact bore size of bin outlet for the plastic pellet can be more even orderly follow the bin outlet discharge, reduces the possibility that the plastic pellet was piled up on the second sieve.

Optionally, the shielding assembly includes baffle and two drive cylinders, two drive cylinders set up on the screening case and are located the bin outlet top, drive cylinder piston rod is vertical to be set up, the baffle sets up on drive cylinder's piston rod and can be used to cover the bin outlet.

Through adopting above-mentioned technical scheme, when need adjust the ejection of compact space bore size of bin outlet, start the actuating cylinder, the flexible baffle motion that can drive the cylinder piston rod can be driven to the actuating cylinder, and the baffle can block partial bin outlet, and the part of not blocking can be used for the ejection of compact.

In summary, the present utility model at least comprises at least one of the following beneficial technical effects:

1. through setting up a plurality of feed mechanism and screening step by step to the plastic pellet, can be more accurate select the plastic pellet of equidimension not, simultaneously, the second sieve in the same feed mechanism carries out the secondary to the plastic pellet and screens, has further improved screening precision.

2. In operation, the vibration mechanism drives the screen plate to vibrate, so that plastic particles can be distributed on the screen plate in a more dispersed mode, screening efficiency is improved, and meanwhile the possibility that stacking of large-size plastic particles hinders screening of small-size plastic particles is reduced.

3. Through can dismantle the connection on first spring with first sieve, make things convenient for operating personnel to change the first sieve of damage.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of the screening box, feed divider and clamping plate of fig. 1.

Fig. 3 is an enlarged view of a in fig. 2.

Fig. 4 is a cross-sectional view of the first vibratory mechanism of fig. 1 in connection with a screening box.

Reference numerals illustrate:

1. a frame; 11. a support plate; 12. a base; 13. a feed pipe; 14. a discharge pipe; 15. a discharge pipe; 16. a second inclined surface; 17. a control valve; 18. a handle; 2. a granulator; 21. a screening box; 22. a discharge port; 23. a communication port; 24. a first chute; 25. a first plate; 26. a second plate; 27. a third plate; 28. a fourth plate; 3. a material distributing mechanism; 31. a first dispensing assembly; 311. a first screen plate; 32. a second dispensing assembly; 321. a material receiving box; 322. a second screen plate; 323. a material guiding pipe; 324. a first inclined surface; 325. a second chute; 4. a first vibration mechanism; 41. a first spring; 42. a first motor; 43. a first eccentric; 5. a clamping piece; 51. a clamping plate; 52. a card interface; 53. a clamping groove; 6. a second vibration mechanism; 61. a second spring; 62. a second motor; 63. a second eccentric; 7. a shielding assembly; 71. a baffle; 72. the cylinder is driven.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the utility model discloses a plastic granulator with a screening device, referring to fig. 1, the plastic granulator comprises a frame 1 and a granulator 2, wherein the frame 1 comprises a supporting plate 11 and a base 12, the supporting plate 11 is fixedly connected to the upper surface of the base 12 and is horizontally arranged, the granulator 2 is fixedly connected to the upper surface of the supporting plate 11, the top of the granulator is fixedly connected with a feeding pipe 13, one side wall of the granulator 2 is fixedly connected with a discharging pipe 14, the upper surface of the supporting plate 11 is fixedly connected with a screening box 21, and the screening box 21 is horizontally arranged and is connected with the discharging pipe 14.

Referring to fig. 1 and 2, two groups of material distributing mechanisms 3 for screening plastic particles are arranged on a screening box 21, the two groups of material distributing mechanisms 3 are distributed along the vertical direction, the material distributing mechanisms 3 are located below a discharging pipe 14, the material distributing mechanisms 3 comprise a first material distributing component 31 and a second material distributing component 32, two material discharging ports 22 are formed in the side wall of the screening box 21, which is parallel to the discharging pipe 14, the material discharging ports 22 are in one-to-one correspondence with the material distributing mechanisms 3, two communicating ports 23 are formed in the side wall, away from the material discharging ports 22, of the screening box 21, and the communicating ports 23 are in one-to-one correspondence with the material discharging ports 22 and are located above the material discharging ports 22.

Referring to fig. 1 and 2, the first material distributing assembly 31 includes a first screen plate 311, the diameter of the screen holes of the first screen plate 311 located above is greater than the diameter of the screen holes of the first screen plate 311 located below, the first screen plate 311 is obliquely arranged, the lowest end of the first screen plate 311 is located in the material outlet 22, the highest end of the first screen plate 311 is located in the communication port 23, two groups of clamping pieces 5 are arranged on the screening box 21, the clamping pieces 5 are in one-to-one correspondence with the first screen plate 311, and the first screen plate 311 is detachably connected to the screening box 21 through the clamping pieces 5.

Referring to fig. 1 and 4, two sets of first vibration mechanisms 4 are disposed on the screening box 21, the first vibration mechanisms 4 are in one-to-one correspondence with the clamping members 5, the first vibration mechanisms 4 include a plurality of first springs 41, a first motor 42 and a first eccentric wheel 43, four first sliding grooves 24 which are simultaneously communicated with the discharge opening 22 and the communication opening 23 are formed in the inner side wall of the screening box 21, the two first sliding grooves 24 are a set of first sliding grooves 24 corresponding to one discharge opening 22, wherein the two first sliding grooves 24 in each set of first sliding grooves 24 are distributed along the width direction of the screening box 21 and are located at two sides of the discharge opening 22, the first sliding grooves 24 are obliquely disposed, the lowest ends of the first sliding grooves 24 are located in the discharge opening 22, the plurality of first springs 41 are uniformly distributed in the first sliding grooves 24 and are fixedly connected to the inner bottom wall of the first sliding grooves 24, the first springs 41 are perpendicular to the inner bottom wall of the first sliding grooves 24, and the clamping members 5 are disposed on the first springs 41.

Referring to fig. 1 and 4, two first plates 25 are fixedly connected to the outer side wall of the screening box 21 far away from the discharging pipe 14, the first plates 25 and the first vibration mechanisms 4 are in one-to-one correspondence and horizontally arranged, a first motor 42 is fixedly connected to the upper surface of the first plates 25, an output shaft is horizontally arranged, one end of the output shaft of the first motor 42 is located in the screening box 21, and a first eccentric wheel 43 is fixedly connected to the output shaft of the first motor 42, and the side wall of the first eccentric wheel is in contact with the clamping piece 5.

Referring to fig. 2 and 4, the clamping member 5 includes a clamping plate 51, the clamping plate 51 is fixedly connected to the upper end of the first spring 41 and slidingly connected in the first chute 24, one end of the clamping plate 51 is located in the communication port 23, the other end of the clamping plate is located in the discharge port 22, the side wall of the first eccentric wheel 43 abuts against the lower surface of the clamping plate 51, a clamping port 52 penetrating through the upper surface and the lower surface of the clamping plate 51 is formed in the side wall, away from the discharge port 22, of the clamping plate 51, a clamping groove 53 is formed in the inner wall of the clamping port 52, the first screen plate 311 is in plug-in fit with the clamping groove 53, the upper surface of the first screen plate 311 and the upper surface of the clamping plate 51 are in the same plane, and a handle 18 facilitating the operator to pull out the first screen plate 311 is fixedly connected to the side wall, away from the discharge port 22, of the first screen plate 311.

Referring to fig. 2 and 3, the second material dividing assembly 32 includes a material receiving box 321, a second screen plate 322 and a material guiding pipe 323, wherein the material receiving box 321 is fixedly connected to the outer side wall of the screening box 21 far away from the communication port 23 and is located below the material discharging port 22, the material receiving box 321 is horizontally arranged and is opened at the upper end, the material guiding pipe 323 is fixedly connected to the side wall of the material receiving box 321 near the screening box 21 and is communicated with the cavity of the screening box 21, the material guiding pipe 323 is obliquely arranged and is located at the lowest end in the screening box 21, an inclined first inclined surface 324 is arranged on the inner bottom wall of the material receiving box 321, the first inclined surface 324 gradually reduces along the direction close to the material guiding pipe 323, a second chute 325 penetrating through the upper surface of the material receiving box 321 is arranged on the inner side wall of the material receiving box 321, the second chute 325 is horizontally arranged and is located above the material guiding pipe 323, the second screen plate 322 is slidingly connected to the second chute 325 and is horizontally arranged, and the size of the second screen plate 322 is identical to the first screen plate 311.

Referring to fig. 2 and 3, the second vibration mechanism 6 is disposed on the two material receiving boxes 321, the second vibration mechanism 6 includes a plurality of second springs 61, a second motor 62 and a second eccentric wheel 63, the plurality of second springs 61 are uniformly distributed in the second sliding groove 325, one end of the second springs is fixedly connected to the inner bottom wall of the second sliding groove 325, the other end of the second springs is fixedly connected to the lower surface of the second screen plate 322, the material receiving boxes 321 are far away from the second plate 26 horizontally disposed on the outer side wall of the screening box 21, the second motor 62 is fixedly connected to the upper surface of the second plate 26, the output shaft of the second motor 62 is horizontally disposed, one end of the output shaft is located in the material receiving boxes 321, and the second eccentric wheel 63 is fixedly connected to the output shaft of the second motor 62, and the side wall of the second springs are in contact with the lower surface of the second screen plate 322.

Referring to fig. 1 and 2, two groups of shielding assemblies 7 for controlling the discharge caliber of the discharge port 22 are arranged on the screening box 21, the shielding assemblies 7 are in one-to-one correspondence with the material distributing mechanism 3, the shielding assemblies 7 comprise a baffle 71 and two driving cylinders 72, two groups of connecting pieces are arranged on the side wall of the screening box 21, and the connecting pieces are in one-to-one correspondence with the shielding assemblies 7; wherein, the connecting piece includes two third boards 27, third board 27 fixed connection is on the lateral wall of screening case 21, drive cylinder 72 and third board 27 one-to-one and fixed connection are in the upper surface of third board 27, the piston rod of drive cylinder 72 pierces through third board 27 and stretches out and draws back along vertical direction, fixedly connected with fourth board 28 that the level set up on the piston rod of drive cylinder 72, baffle 71 fixed connection is on the lower surface of fourth board 28 and vertical setting, baffle 71 is close to the lateral wall of bin outlet 22 and contradicts in the lateral wall of screening case 21.

Referring to fig. 1 and 2, a discharge pipe 15 is fixedly connected to an inner bottom wall of the screening box 21, the discharge pipe 15 penetrates through an upper surface of the supporting plate 11, a control valve 17 is fixedly connected to the discharge pipe 15, an inclined second inclined surface 16 is arranged on the inner bottom wall of the screening box 21, and the height of the second inclined surface 16 gradually decreases along a direction approaching the discharge pipe 15.

The implementation principle of the plastic granulator with the screening device provided by the embodiment of the utility model is as follows:

in the plastic pellet reached screening case 21 from granulator 2 through discharging pipe 14, the plastic pellet got into screening case 21 after first falling on the first sieve 311 of top, first sieve 311 carries out the first screening to the plastic pellet, can start first motor 42 throughout the screening process, and the rotation of first motor 42 output shaft drives first eccentric wheel 43 and rotates and beat joint board 51, and joint board 51's vibration drives first sieve 311 vibrations for the plastic pellet can more dispersed distribution on second sieve 322, improves screening efficiency.

Wherein, part plastic pellet is through screening and falls to the first sieve 311 in the feed mechanism 3 of next and carry out the secondary screening, and another part plastic pellet is through screening and falls to receiving the workbin 321 from bin 22 after the screening and collect and screen once more, and the second motor 62 is also started all the time in the screening process, and the rotation of second motor 62 output shaft drives second eccentric wheel 63 and rotates and beat second sieve 322, can make the plastic pellet on the second sieve 322 more dispersion.

And after the screening is finished, the plastic particles smaller than the mesh size of the first screen plate 311 below fall to the bottom of the screening box 21 and are discharged through the discharge pipe 15.

In operation, when the first screen plate 311 needs to be replaced, the operator holds the handle 18 and pulls the first screen plate 311 away from the material receiving box 321, and pulls the first screen plate 311 out of the clamping groove 53 for replacement.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (9)

1. The utility model provides a plastics granulator with sieving mechanism, includes frame (1) and granulator (2), be provided with discharging pipe (14) on granulator (2), be provided with screening case (21) that top and discharging pipe (14) are connected on frame (1), its characterized in that: the screening box (21) is provided with a plurality of distributing mechanisms (3) distributed along the vertical direction, each distributing mechanism (3) comprises a first distributing component (31) and a second distributing component (32), each first distributing component (31) comprises a first screen plate (311), each screening box (21) is provided with a plurality of discharging holes (22), each discharging hole (22) corresponds to each distributing mechanism (3) one by one, each first screen plate (311) is obliquely arranged in each screening box (21) and the lowest end of each first screen plate is positioned in each discharging hole (22), each second distributing component (32) comprises a material receiving box (321), a second screen plate (322) and a material guiding pipe (323), each material receiving box (321) is arranged on each screening box (21) and is positioned below each discharging hole (22), each second screen plate (322) is arranged in each material receiving box (321) and is identical to each first screen plate (311), each material guiding pipe (323) is arranged on each material receiving box (321) and is positioned on the lower side of the first screen plate (311) and is communicated with one large screen plate (311) on the side of the first screen plate (311), a discharge pipe (15) is arranged at the bottom of the screening box (21).

2. A plastic granulator with a screening device according to claim 1, wherein: the screening box (21) is provided with a plurality of groups of first vibrating mechanisms, and the first vibrating mechanisms are in one-to-one correspondence with the first screen plates (311) and are used for driving the first screen plates (311) to vibrate.

3. A plastic granulator with screening apparatus according to claim 2, wherein: the first vibrating mechanism (4) comprises a plurality of first springs (41), a first motor (42) and a first eccentric wheel (43), wherein the first sieve plate (311) is connected onto the screening box (21) in a sliding mode, one ends of the first springs (41) are arranged on the screening box (21), the other ends of the first springs are arranged on the first sieve plate (311), the first motor (42) is arranged on the screening box (21), and the first eccentric wheel (43) is arranged on an output shaft of the first motor (42) and the side wall of the first eccentric wheel is in interference with the first sieve plate (311).

4. A plastic granulator with screening apparatus according to claim 3, wherein: the first spring (41) is provided with a clamping piece (5), and the first sieve plate (311) is detachably connected to the first spring (41) through the clamping piece (5).

5. A plastic granulator with screening apparatus according to claim 4, wherein: the screening box (21) is kept away from a plurality of communication openings (23) on the lateral wall of bin outlet (22), communication openings (23) and bin outlet (22) one-to-one and are located bin outlet (22) top, joint spare (5) are including joint board (51), joint board (51) set up on first spring (41) and slide with screening box (21) and be connected, joint board (51) one end is located communication opening (23), and the other end is located bin outlet (22), joint board (51) are kept away from joint interface (52) of running through joint board (51) upper and lower surface on the lateral wall of bin outlet (22) have been seted up on the lateral wall of joint interface (52), joint groove (53) have all been seted up on the inside wall of joint interface (52), first sieve (311) grafting cooperation is in joint groove (53).

6. A plastic granulator with a screening device according to claim 1, wherein: the material receiving boxes (321) are respectively provided with a second vibrating mechanism (6), and the second vibrating mechanisms (6) are used for driving the second sieve plate (322) to vibrate.

7. A plastic granulator with a screening apparatus according to claim 6, wherein: the second vibration mechanism (6) comprises a plurality of second springs (61), a second motor (62) and a second eccentric wheel (63), the second screen plate (322) is connected onto the material receiving box (321) in a sliding mode, one ends of the second springs (61) are arranged on the screening box (21), the other ends of the second springs are arranged on the second screen plate (322), the second motor (62) is arranged on the material receiving box (321), and the second eccentric wheel (63) is arranged on an output shaft of the second motor (62) and the side wall of the second eccentric wheel is in interference with the second screen plate (322).

8. A plastic granulator with a screening device according to claim 1, wherein: a plurality of shielding assemblies (7) for controlling the discharge caliber of the discharge opening (22) are arranged on the screening box (21), and the shielding assemblies (7) are in one-to-one correspondence with the discharge openings (22).

9. A plastic granulator with a screening device according to claim 8, wherein: the shielding assembly (7) comprises a baffle (71) and two driving air cylinders (72), wherein the two driving air cylinders (72) are arranged on the screening box (21) and are located above the discharge opening (22), piston rods of the driving air cylinders (72) are vertically arranged, and the baffle (71) is arranged on the piston rods of the driving air cylinders (72) and can be used for covering the discharge opening (22).